Advice Please

Hi, all. Yesterday morning at 12dpo I tested with an early prediction test and a cheapie and got a negative. At about 16h in the afternoon I got a vfp on 2 cheapies (see picture).

This morning however I had a stark white negative with FMU at 4h, 9h and just now at 14h.

Is this normal? Or is it a chemical?

AF due tomorrow.

Thanks so much